Hadmut Danisch <hadmut@danisch.de> wrote:
just a simple question about dovecot:
The mbox file format contains the SMTP envelope sender and transmission date in a FROM ... line preceding the RFC822 mail header and body.
As far as I see at the moment, the IMAP protocol does not support transmission of that SMTP envelope data in either way, but confusingly uses the term „envelope” for a structure describing the RFC822 mail header.
My question is, whether there is any way to retrieve the SMTP envelope through dovecot's IMAP anyway, maybe through some extension.
Almost all MTA copy "(SMTP) envelope sender" to Return-Path: header before delivery to the final mailbox.
If you do not get Return-Path: header in messages delivered to your (dovecot) mailbox then name your MTA (exim/postfix/sendmail/.....).
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